Buttonhole-sewing machine.



PATENTED AUG. 16, 1904-.

I). H. HAYWOOD.

BUTTONHOLE SEWING MACHINE.

APPLICATION FILED MAR. 7, 1904.

2 SHEBTS-SHEET 1.

N0 MGDEL.

INVENTOR WITNESSES:

w 4 WM ATTORNEYS No. 767,478. PATENTED AUG. 16, 1904.

' D. H. HAYWOOD.

BUTTONHOLE SEWING MACHINE.

APPLICATION FILED MAR. 7, 1904.

N0 MODEL. 2 SHEETS-SHEET 2.

WlTNESSES:

UNITED STATES -Patented August 16, 1904.

PATENT @rrrcgn.

DANIEL HOWARD HAYIVOOD, OF NEIV YORK, N. Y., ASSIGNOR TO THE NATIONALMACHINE COMPANY, OF MAMARONEGK, NET/V YORK, A COR- PORATION OF NEWVYORK.

BUTTONHOLE-SEWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 767,478, dated August16, 1904.

Application filed March '7, 1904. Serial No. 196,907. (N model.)

To all whmn it warty concern.-

Be it known that I, DANIEL HOWARD HAY- WOOD, a citizen of the UnitedStates of America, and a resident of the city of New York,

borough of Manhattan, county and State of New York, haveinvented certainnew and useful Improvements in Buttonhole-Sewing Machines, of which thefollowing is a specification, reference being had to the accompanying Idrawings, forming a part thereof.

My invention relates to buttonhole-sewing machines, and particularly tomachines for sewing round-end or eyelet buttonholes.

Hy invention consists in certain improved 5 means for controllinglateral movements of the needle-bar for shifting the field of thejogging movement thereof to and between opposite sides of thebuttonhole-slit at the time of sewing round the ends thereof.

2 The main object of my invention is to simplify the mechanism for thispurpose, while at the same time permitting ready manual adjustment ofthe amplitude of jogging movements imparted without necessarycorrespond- 5 ing adjustment of the extent of the shifting movements,and independent manual adjustment for the extent of the shiftingmovement imparted, without change of the pattern-cam employed andwithout necessary correspond- 3 ing adjustment of the amplitude of thejogging movements.

I will now proceed to describe a buttonhole-sewing machine embodying myinvention, and will then point out the novel features in the claims.

In the drawings, Figure 1 is a view in side elevation of abuttonhole-sewing machine embodying my invention. Fig. 2 is adetailview, in horizontal section. of certain parts, the plane of sectionbeing taken substantially upon the line 2 2 of Fig. 1. Fig. 3 is adetail view of a form of pattern-cam employed in stitching round-endbuttonholes. Fig. 4: is a diagrammatic view of a round-end buttonhole.Fig. 5 is a detail view of a form of patterncam employed in stitchingeyelet-end buttonholes. Fig. 6 is adiagrammatic view of an eyelet-endbuttonhole.

The machine illustrated herein comprises in main the Well-known form ofbuttonhole-sew- 5 ing machine made by The National Machine Company,certain parts thereof being removed and other parts substituted thereforin carrying out my invention. The machine comprises the usual bed 1,overhanging arm 2, and front head 3. A Work-clamp 4 receives andpresents the Work for stitching and is reciprocated longitudinally Withrespect to the buttonhole being stitched2'. a, transversely of themachine itselfby any suitable well -l;nown feed mechanism. In stitchinga complete buttonhole with the present machine no lateral movement isimparted to the Work-clamp or work whatsoever, all the movementsnecessary for shifting the field 5 of the stitching operations laterallybeing given to the needle.

The stitch-forming mechanism includes a vertically-reciprocating andlaterally-vibrating needle-bar 5, such as is commonly em- 7 ployed inmachines of this type. The needlebar is mounted to reciprocatevertically in a laterally-vibrating gate, one end, 6, of which appearsin Fig. l of the drawings, and a pitman or connecting-rod 7, connectedat one end with the said vibratinggate 6, constitutes amovementtransmitting means therefor. Two separate, and distinct classesof lateral movements are transmitted through the movement-transmittingmeans to the gate, and hence to the needle-bar. These movements may bedescribed, first, as laterally vibrating or jogging movements of theneedle necessary for overseaming, as is well known, and, second, amovement for shifting the field of op- 5 eration of the needle in itsoverseaming movements, so that the operation of overseaming may beshifted from one side of the buttonhole-slit to the other around theends of the buttonhole-slits. The means for transmitting 9 the laterallyvibrating or jogging movements to the needle comprises a vibrating lever9, mounted upon a rock-shaft 10 and vibrated in the usual manner bymeans of a cam 11, suitably driven from the main shaft 12 of themachine. The lever 11 has a fixed and unvarying period of vibration. Areciprocating element comprising a sliding plate 13 is mounted betweenhorizontal guides 14 and is connected by means of a link 15 with thevibrating lever 9. Reciprocating movement is transmitted to thereciprocating element by its connection with the vibrating lever 9, andthe period of movement of the vibratin lever being constant theamplitude of movement transmitted to the reciprocating element will beuniform. A manual adjustment, however, is provided for increasing ordecreasing the amplitude of movement of the reciprocating element, theend of the link 15 being adjustably connected in a slot in the vibratinglever 9, so that it may be adjusted to a position nearer to and fartheraway from the center of oscillation of the said lever. By adjusting theconnection of the link 15 with the lever 9 farther away from the centerof oscillation thereof the amplitude of movement imparted to thereciprocating element will beincreased and similarly the amplitude ofmovement imparted to the reciprocating element will be decreased as theconnection of the link 15 is adjusted nearer the center of oscillationof the vibrating lever 9. The reciprocating element includes a stud orsupport 16 upon which is mounted a bell-crank lever 17. The bellcranklever has a substantially vertical arm 18 and a substantially horizontalarm 19. The vertical arm 18 is connected to one end of the pitman orconnecting-rod 7, and the horizontal arm 19 of said lever is connectedto the upper end. of a verticallyarranged connectingrod 20, pivoted atits lower end to a lever 21, fulcrumed to the bed of the machine at 22.The upper end of the rod 20 will of course partake of the lateralmovements of the slideplate 13, stud or support 16, and bell-crank lever17, and such movements will be permitted freely by reason of the pivotalconnection between the lower end of the said. rod and the outer end ofthe lever 17. The bed 1 of the machine is suitably apertured to permitsuch lateral movements, and it will be understood that while the upperend of the rod 20 will actually travel'in an are described with the axisof the connection between the lower end of the rod 20 and the outer endof the lever 21 as a center the arc is so short and the radius thereofso large that the vertical component of the movement of the upper end ofthe rod 20 will be so small as to be practically negligible. The lever21 has a projection 23 thereon, which bears against a cam 52% and actsas a cam-follower therefor. A spring 25 holds the cam and follower up tothe face of the cam and maintains the parts in their proper relativepositions.

The connection of the pitman or connecting-rod 7 with the arm 18 of thebell-crank lever 17, which bell-crank lever is carried by thereciprocating element 13 16, will cause the movements of reciprocationof the said reciprocating element to be transmitted to the needlebar sothat the same will be given the laterally reciprocating or joggingmovements required for thc'purpose of producing overseaming-stitchcs inthe manner well known. By shifting the position of the bell-crank 17upon the reciprocating element laterally shift-.

ing movements will be imparted to the needle-bar independentof thelaterally vibrating or jogging movements. The pattern-cam 24:, which isdriven by any suitable mechanism in a manner well-known in this class ofmachine, will impart the necessary movements through the lever 21 andconnecting-rod 20 to the bellcrank lever 17 in order to give therequired shifting movements. A cam, substantially as shown in Fig. 3,will produce a round-end buttonhole. such as is illustrateddiagrammatically in Fig. 1, the low portion of the cam representing thestitching on one side of the buttonhole and the high portion stitchingon the other side of the buttonhole, while the inclines between themrepresent stitching around the ends of the buttonhole. A pattern-cam,substantially as is shown in Fig. 5, will produce eyelet-endbuttonholes, such as is illustrated diagrammatically in Fig. 6, the lowportion of the cam dropping to a still lower plane and the high portionof the cam rising to a still higher plane before reaching the inclineswhich connect the two portions in order to form the swelled portionaround the eyelet end.

In order that the position of the stitching upon opposite sides of thebuttonhole with respect to a line passing centrally therewith may beadjusted toward and away from such central line, and that withoutvarying the amplitude of the jogging movements, so that the length ofstitches will not be varied, I have provided means for manuallyadjusting the point of connection of the connecting-rod 20 with the arm19 of tl'lebell-crank lever 17. Such means for manual adjustmentcomprises a stud and nut 26 carried by the connectingrod 20 and a slot27, in which the same is mounted. This slot permits the stud 26 to bemoved toward and away from the center of the oscillation of thebellcrank lever 17, whereby the throw of same may be varied at willwithout change to the cam 2 1 employed. It will be understood, however,that this change in throw in no way affects the amplitude of the joggingmovements imparted to the needle, but merely the position of the fieldfor such jogging movements with respect to the central line of thebuttonhole, and it will also be clear that by properly locating the slotthis adjustment will be equal upon both sides of the buttonhole withrespect to the central line thereof.

l/Vhat I. claim is 1. In a buttonhole-sewing machine,the combinationwith stitch-forming mechanism including a verticallyreciprocating andlaterreams ally-vibrating needle-bar, of a reciprocating element, meansfor reciprocating same to produce the lateral vibrations of saidneedle-bar, a bell-crank lever pivoted to and carried by saidreciprocating element, means connecting one arm of said bell-crank leverwith said needle-bar, and means connected with the other arm of saidbell-crank lever for controlling pivotal movements thereof to vary theworking position of the needle-bar.

2. Ina buttonhole-sewing machine,the combination with stitch-formingmechanism including a vertically reciprocating and laterally-vibratingneedle-bar,of a vibrating lever, means for vibrating same to produce thelateral vibrations of said needle-bar, a bell-cranklever supportconnected to said vibrating lever, a bell-crank pivotally mounted uponsaid support, a pitman or connecting-rod connecting one arm of saidbell-crank lever with the said needle-bar, and means engaging the otherarm of said bell-crank lever for varying and determining the position ofsaid bellcrank lever with respect to its support to vary and determinethe Working position of the needle-bar.

3. Inabuttonhole-sewingmachine, the combination with stitch-formingmechanism, including a vertically-reciprocating and laterally-vibratingneedle-bar, of a reciprocating element, means for reciprocating same,abellcrank lever having a substantially vertical and a substantiallyhorizontal arm, pivotally supported on and carried by said reciprocatingelement, means connecting the vertical arm of said bell-crank lever withthe said needle-bar, whereby laterally-vibrating movements aretransmitted thereto, a connectingrod connected with the horizontal armof said bell-crank lever, and arranged substantially at right anglesthereto and at right angles to theline of reciprocating movement of thesaid reciprocating element, and means controlling longitudinal movementsof said connectingrod whereby the said bell-crank lever is rocked uponits support, substantially as and for the purpose specified.

4. In a buttonhole-machine, the combination with stitch-formingmechanism, including a vertically reciprocating and laterally vibratingneedle-bar, of a stud or support 16, means for imparting thereto lateralmovements of vibration of a predetermined constant period, a bell-cranklever supported by said stud, said bell-crank lever having asubstantially vertical and a substantially horizontal arm, a pitman orconnecting-rod 7 connecting the vertical arm of said bell-crank leverwith the said needle-bar, whereby the laterally-vibrating movements ofsaid stud or support 16 are imparted to the said needle-bar to producethe said laterally-vibrating movements thereof, a vertically-arrangedconnecting-rod connected at one end with the horizontal arm of saidbell-crank lever, and means pivotally connected with the opposite end ofsaid verticallyarranged connecting-rod controlling longitudinalmovements thereof, whereby shifting movements are transmitted to thebell-crank lever while still permitting the above-mentionedlaterally-vibrating movements thereof.

5. In abuttonhole-sewing machine, the combination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of a reciprocating element, means for reciprocating same toproduce the lateral vibrations of said needle-bar, means for manuallyadjusting the amplitude ofreciprocating movements imparted thereto, abell-crank lever pivoted to and carried by said reciprocating element,means connecting one arm of said bell-crank lever with said needle-bar,and means connected with the other arm of said bell-crank lever forcontrolling pivotal movements thereof about its pivotal support to varythe working position of the needle-bar.

6. In a buttonhole-sewing machine,the combination With stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of a reciprocating element, means for reciprocating same toproduce the lateral movements of said needlebar, a bell-crank leverpivoted to and carried by said reciprocating element, means connectingone arm of said bell-crank lever With said needle-bar, means connectedwith the other arm of said bell-crank lever for controlling pivotalmovements thereof to vary the working position of the needle-bar, andmeans for manually adjusting the limit of said pivotal movements.

7. In a buttonhole-sewing machine,the combination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of a reciprocating element, means for reciprocating same toproduce the lateral vibrations of said needlebar, means for manuallyadjusting the amplitude of such reciprocating movements, a bellcranklever pivoted to and carried by said reciprocating element, meansconnecting one arm of said bell-crank lever With said needlebar, meansconnected with the other arm of said bell-crank lever for controllingpivotal movements thereof to vary the Working position of theneedle-bar, and means for manually adjusting the limit of such pivotalmovements.

8. In a buttonhole-sewing machine,the com bination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of a reciprocating element, means for reciprocating same toproduce the lateral vibrations of said needle-bar, means for manuallyadjusting the amplitude of such reciprocatingmovements, a bell-cranklever pivoted to and carried by said reciprocating element, meansconnecting one arm of said bell-crank lever with said needle-bar, meansconnected with the other arm of said bell-crank lever for controllingpivotal movements thereof to vary the working position of saidneedle-bar, and manually-adjustable means for adjusting the point ofconnection of said controlling means with said bell-crank lever.

9. In a l uttonhole-sewing machine,the combination with stitch-formingmechanism including a vertically-reciprocating and laterally-vibratingneedle-bar, of a reciprocating slide. said slide in its reciprocatingmovements adapted and arranged to impart the laterallyvibrated movementsto said needle-bar, a vibrating lever 9, a link 15 connecting said slidewith said lever, a bell-crank lever 17 pivotally mounted upon saidslide, a pitman 7 connecting one of the arms 18 of the bell-crank leverwith the needle-bar, a vertically-arranged connecting-rod 2O pivotall yconnected to the other arm 19 of the bell-crank lever, and meanssubstanti ally as described for longitudinally moving saidconnecting-rod 20, whereby the bellcrank lever may be rocked upon itspivotal support to vary the working position of the needle-bar.

10. In a buttonholesewing machine, the combination with stitch-formingmechanism including a verticallyreciprocating and laterally-vibratingneedle-bar, of a reciprocating element, means for reci n ocating same toproduce the lateral vibrations of said needlebar, a bell-crank leverpivoted to and carried by said reciprocating element, means connect ingone arm of said bell-crank lever with said needle-bar, and a cam forcontrolling pivotal movements of said bell-crank lever upon its supportto vary the working position of the needle-bar.

including a vertically-reciprocating and laterally-vibrating needle-bar,of a reciprocating element, means for reciprocating same to produce thelateral vibrations of said needlebar, a bell-crank lever pivoted to andcarried by said reciprocating element, means connecting one arm of saidbell-crank lever with said needle-bar, a connecting-rod connecting Withthe other arm of said bell-crank lever, and a cam for impartinglongitudinal movements to said connecting-rod whereby the bell-cranklever may be rocked upon its pivotal support to vary the workingposition of the needle-bar.

12. In a buttonhole-sewing machine, the combination with stitch-formingmechanism, including a verticallyreeiprocating and laterally-vibratingneedle-bar, of means for laterally vibrating the needle-bar and forshifting the field of such lateral vibratory movements gradually aroundthe end of a buttonhole from one side to the other While the work isheld. stationary as to the lateral movements, and without necessarilyvarying the amplitude of such vibratory movements, said means comprisinga vibrating member having a substantially uniform extent of vibrationthroughout, the path of such vibration being substantially at rightangles to the plane of vertical reciprocation of the needle-bar, abellcrank lever thereon having two arms, one projecting laterally withrespect to the vertical plane of movement of the reciprocatingneedle-bar, and. the other arranged at substantially right angles to thefirst-said arm, movement-transmitting means connecting the lastsaid armwith the said needle-bar, a connecting-rod connected to the saidhorizontal arm and arranged substantially at right angles thereto, andmeans for controlling movements of the connecting-rod to impart pivotalmovements to the said bell-crank lever.

DANIEL HOWARD HAYWOOD.

\Vitnesses:

C. F. (JARnINe'roN, CHAS. J. JonNsoN.

